Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years.
from NASA https://ift.tt/2GDsf1J
Gullies of Matara Crater
Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years.
from NASA https://ift.tt/2GDsf1J
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